There are tons of antique shops in Aurora and Dundee. Makes for a nice day trip - if you like antiques in your house (I do not, but I have had good time going on day trips with the family around both of these little towns - and there are tons of these shops there).
Forgot about Sellwood! There are a bunch of antique shops over in that area. http://www.pdxinteriors.com/guide/sellwood.php
there was a cool store in the pearl that had strange and odd worldly goods. I think its in the building that Pier 1 used to be.
If you're looking for ideas, hit up Rejuvination on Grand, however their stuff is new and expensive. Once you see what you want there, you can figure out exactly where to go.
My wife does some design work. South Seattle is probably too far from you, but she worked at/for/with a store called Chair and Trellis. They're online also. They have some really nice stuff, and the connections to get more.
